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Spherical coated magnesium oxide powder and method for production thereof, and resin composition comprising the powder

A technology for coating magnesium oxide and resin compositions, which is applied in the direction of magnesium oxide, magnesium compounds, chemical instruments and methods, etc., and can solve problems such as high resin filling difficulties

Active Publication Date: 2006-09-27
TATEHO CHEM IND CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Although the purpose of this method is to improve the moisture resistance of magnesium oxide powder, since the granulation is carried out by using a spray dryer, the spherical particles obtained are aggregates of particles, that is, porous bodies, so it is predicted that the high filling of the resin will be extremely difficult. difficulty

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0055] The present invention will be described in more detail using examples, but the present invention is not limited to the following examples.

[0056] 1. Spherical coated magnesium oxide powder

Synthetic example 1

[0058] Will be used as microcrystalline particles to be 58.3×10 -9 The magnesium oxide powder (KMAO-H manufactured by Tachiho Chemical Industry Co., Ltd.) of aggregates of single crystals of m was pulverized into a particle size of 100×10 with an impact mill. -6 m or less. Add fumed silica (purity 99.9% or above, specific surface area 200±20m2) by wet method 2 / g), and make the mixing ratio of magnesia 10% by mass, and stir and mix for 600 seconds at a speed of 400 to 500 rpm. After stirring and mixing, the block obtained by filtration and dehydration was dried overnight at 423K with a drier. The dried agglomerate was pulverized with a sample mill and adjusted to a particle size equivalent to that of the magnesium oxide powder to obtain a coated magnesium oxide powder.

Synthetic example 2

[0060] A coated magnesia powder was obtained in the same manner as in Synthesis Example 1 above except that the mixing ratio of fumed silica was 3% by mass.

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PUM

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Abstract

Provided is a sphere-shaped coated magnesium oxide powder having a surface coated with a double oxide and having an average shape factor of 1.25 or less, wherein the powder is advantageous not only in that it has excellent humidity resistance, but also in that it has excellent filling property and excellent flowability when being used as filler for a resin. In addition, provided is a method for producing a sphere-shaped coated magnesium oxide powder, wherein the method comprises allowing a compound of an element forming a double oxide to be present on the surface of magnesium oxide powder, and then fusing the resultant magnesium oxide powder at a high temperature so that the surface of the magnesium oxide powder is coated with the double oxide and the magnesium oxide powder is shaped into sphere. Further, provided are a resin composition comprising the sphere-shaped coated magnesium oxide powder and an electronic device using the resin composition.

Description

technical field [0001] The present invention relates to a spherical coated magnesium oxide powder which is excellent in moisture resistance and has excellent filling properties when used as a filler, and a method for producing the same. Also, the present invention relates to a resin composition containing the spherical coated magnesium oxide powder, and an electronic device using the resin composition. Background technique [0002] Electronic devices are composed of electronic components such as laminates, printed circuit boards, and multilayer circuit boards. In electronic components, generally, resin compositions are used for prepregs, partition walls, encapsulants, adhesive sheets, and the like, and therefore various performances or characteristics are required for the resin compositions. For example, the recent trend can be seen in the mounting of large-capacity power electronic components and high-density mounting in electronic devices. With these, resin compositions a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/02C01F5/02C08K9/02C08L101/00H05K1/03
CPCC01P2004/54C01P2004/32C01P2004/84C09C1/028H05K1/0373C01F5/02H05K2201/0209Y10T428/2991C01F5/00C09C1/02
Inventor 清川敏夫山元香织国重正明
Owner TATEHO CHEM IND CO
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